Hello,
I am designing a passthrough PCB for Automotive Ethernet and GVIF2 communication lines. The reason why is because the wire-to-wire connectors are not available right now. So, I am making a PCB to connect two harnesses together. The wires of the harness are STP (Shielded Twist Pair), and I would like to continue the continuity of the shield between the harnesses. I assume the cable has an impedance of 100 ohm, but I do not have any specification to back that up.
Each wire has its own shield. I decided to keep each shield plane separate to help prevent noise from traveling between shields. I have stitched the top and bottom layers together to create a cage around the signal traces. No idea if this will actually help, just felt good to do.
If there are general comments, please feel free to share too. I am far from an expert
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
Sorry if I missed to add any important information needed for an informed discussion.
QuestionIs it OK to stitch the top and bottom layer shields together?
Layer InfoLayer 1: Shield
Layer 2: Signal
Layer 3: -
Layer 4: Shield
Stackup InfoSee attached imagesInner Copper: 0.5oz
Outer Copper: 1oz
Prepreg Type: 7628
Prepreg Dielectric Constant: 4.4
Differential Pair Design InfoSee attached imagesZDiff: 100 ohm (Ethernet and LVDS)